SV: [Icc-avr] ATMega644p -> ADC

[Steven Lose]

Hi.
have you included the right target header file?

Med venlig hilsen / Best regards / mit freundlichen Grüßen

EC POWER A/S

Steven Lose

Software Ingeniør

Tlf.: +45 87434100

Direkte tlf. +45 58286608

Email: sl at ecpower.dk

www.ecpower.dk

-----Oprindelig meddelelse-----
Fra: icc-avr-bounces at imagecraft.com [mailto:icc-avr-bounces at imagecraft.com] På vegne af Rainer Dehnert
Sendt: 28. september 2008 00:29
Til: icc-avr at imagecraft.com
Emne: [Icc-avr] ATMega644p -> ADC

Hi,

using ATMega644p at 20MHz with my desired settings:
- 1,1V internal Reference
- Auto trigger @ timer0 compare match
- division factor 128 -> 156,250kHz


#pragma interrupt_handler adc_isr:iv_ADC

//globals
unsigned int adc_data[9];

//adc isr
void adc_isr(void) {
  static unsigned char input_index;
 
  adc_data[input_index] = ADC;
 
  if(++input_index == 8)
    input_index = 0;
   
  ADMUX = (0b10000000 + input_index);
  
  putchar('a');  //only for debugging
}

//adc init
void adc_init(void) {
  ADMUX  = 0;
  ADCSRA = 0b10101111;
  ADCSRB = 0b00000011;
  ADC    = 0;
  DIDR0  = 0b11111111;
}


Running the code above the adc-isr is never executed.
I called SEI() within 'init_devices' and the timer0_comp_isr is
executed every 1,022ms correctly.

What's going wrong?

Many thanks in advance,
Rainer

_______________________________________________
Icc-avr mailing list
Icc-avr at imagecraft.com
http://dragonsgate.net/mailman/listinfo/icc-avr